Special Offers

58mm long by 44mm wide - adds a splash of colour to laptops, camera cases, fridge doors or anywhere else you can think to put it.

Not only are you helping the Foundations educational aims by buying these, you're also brightening up the world for everyone else :-)

What's in the box?

6 x Raspberry Pi Stickers

The DAC is a HAT compliant add on accessory for the Raspberry Pi A /B /RPi2 /RPi3 or PRi4. The DAC uses the Texas Instruments PCM5122 DAC to deliver analogue audio to the DAC ’s Phono connectors. The PI DAC also supports a dedicated headphone amplifier.

The PDAC can be connected to the Raspberry Pi’s 40way pin header without any additional soldering. The DAC is powered by the Raspberry Pi.



P1 Analogue out (0.. carries GPIO27, MUTE signal (headphone detect), Left and Right Audio and Left and Right Ground.
P6 Headphone socket signals (1: LEFT, 2: GROUND, 3: RIGHT, 4: GROUND, 5: DETECT)

Specifications

Check out our audio boards documentation for help selecting and using Raspberry Pi audio boards.

The Raspberry Pi DAC+ is compatible with any Raspberry Pi computer that has a 40-pin GPIO header.

Form factor: 58 mm × 65 mm

Performance: Full high definition 24-bit 192kHz Texas Instruments PCM5122 digital audio codec (DAC)

Input power: Supplied by Raspberry Pi through the 40-pin GPIO header. No external power source required

Features

• Power LED
• Analogue audio out (0-2V RMS) via panel-mounted stereo
• phono (RCA) sockets with MUTE signal (headphone detect)
• Dedicated headphone amplifier, output via 3.5mm panelmounted barrel socket
• 40-pin pass-through GPIO header
• HAT EEPROM write-enabled

Operating temperature: 0°C–50°C

What's in the box?

1 x IQaudio DAC

Resources

The product brief is available at Raspberry Pi DAC+ product brief

This is the perfect cable choice for those that want to output music or general sound for the BBC micro:bit, to either headphones or speakers.

At one end of the cable are the black and red crocodile clips, which connect to the microbits GND and Pin 0 respectively. At the other end of the cable is a 3.5mm TRS (tip, ring sleeve) stereo jack.

The 3.5mm TRS stereo jack means you can either connect your headphones directly to your BBC micro:bit or if you would rather use a speaker, you can use one of our MP3 mono amplifier kits to drive the speaker.

Please Note:

Although the BBC micro:bit can supply enough current to drive a pair of headphones, you will need an amplifier if you wish to drive an audio speaker. A MP3 mono amplifier kit is an ideal choice as it offers both the amplifier and speaker.

Please be aware however this lead does not work with true Mono leads and is designed to work with Stereo Leads. 
 

Features

• Plug headphones directly onto the 3.5mm TRS stereo jack.
• Crocodile clips for direct connection to the BBC micro:bit.

Dimensions

• Length: 400mm.
• Clips: 28mm.

What's in the box?

1 x BBC micro:bit Audio Cable.
 

Commonly used in machine parts, die fixture, and clamping, Allen head screws enable you to drive in and secure this type of fastener where there is not sufficient space to use a traditional socket or wrench.

Great for building your own CNC project or 3D printer

Specifications

• Black
• M5 x 16mm
• Steel Alloy
• pack of 10

What's in the box?

10 x Screws

• Material: Plastic and Metal
• Shape: round
• Turns: 10 turns
• Technics: wirewound
• Independent linearity: ±0.25%
• Resistance: 10K Ω
• Resistance tolerance: ±2 ~ ±10%
• Power-rating: 2W
• Angle of rotation: 3600±5°
• Rotational life (no load) cycles: 1,000,000
• Shaft diameter: 6.35mm
• Operating temperature range: 1℃ ~ 125℃
• Storage temperature: -55 ~ 125℃

• 1pcs 10 turn potentiometer
• 1pcs rotary dial knob
• 1pcs small Hexagonal spanner

• Setup
• Python Library
• Definition, Types, And Working Principle

• Microcontroller Atmel ATmega328
• Operating Voltage (logic level): 5V
• Input Voltage (recommended): 7V ~ 12V
• Input Voltage (limits): 6V ~ 20 V
• Digital I/O Pins: 14 (of which 6 provide PWM output)
• Analog Input Pins: 8
• DC Current per I/O Pin: 40mA
• Flash Memory: 32KB (ATmega328) (of which 2 KB used by bootloader)
• SRAM: 2KB (ATmega328)
• EEPROM: 1KB (ATmega328)
• Clock Speed: 16MHz
  
  

• 5.5mm x 2.1mm barrel
• 26cm cable

HX711 is an electronic scale module, whose working principle is to convert the measured changes in resistance value changes, through the conversion circuit into electrical output.

Specifications:

  Comprehensive error: 0.05% F.S
  Rated output temperature drift: ≤ 0.15% F.S / 10 ℃
  Output Sensitivity: 1.0 ± 0.1 mV / V
Zero drift: 0.05% F.S (1 minute)
Zero point temperature drift: 0.2% F.S / 10 ° C
Zero output: ± 0.1 mV / V
Input impedance: 1000 ± 50Ω
Output impedance: 1000 ± 50Ω
Overload capacity: 150% F.S
Recommended excitation voltage: 5-10V
Operating temperature range: -10 ~ 50 ℃


Application:

For high-precision small-scale weighing for micro-automatic testing equipment, micro-weighing equipment, pushing and pulling equipment, pull pressure test

Red: E
Black: E-
White: A-
Green: A

What's in the box?

1 x Weighing Sensor Load Cell
1 x HX711 Module

Resources:
Building a Raspberry Pi weight scale
Python Library
Building an Arduino weight scale

Voice control your lights. All Sonoff Wi-Fi Light switches can be controlled remotely using your phone. Works with Amazon Alexa and Google Assistant which lets you turn on or off your lights with voice commands. Features sensitive touch buttons that are simple, stylish and modern on any wall surface. Reduce monthly electricity bills by turning lights off using scheduling for auto-off. Setting timers for devices and switches will automate your home. Simply set scenes and your home will perform the routine task, automatically saving you time and money. Turn off groups of devices with a single tap on your phone or by saying “Ok Google lights off”

Sonoff Smart Wi-Fi Light Switch is compatible with IFTTT function, i.e. The switches can communicate with all compatible devices and services, to trigger them on or off. Easy to follow steps to access your smart home. The share control provides you a quick way to allow you and your family to control devices together. You’re not sure whether the lights where on or off after leaving home, just take your phone out and open the app to check the real time device status.

*Please note that light switches do not have built-in dimming functionality*

Requires a qualified electrician to install.

**Switches Require a Neutral Wire and 2.4Ghz Wi-Fi and Internet**

Features

• Application control
• Timing schedules
• Voice control
• Share control
• RF control
• Touch control

What's in the box?

1 x SONOFF T2 Smart Switch

1.  Small size, low cost
2.  Easy to integrate
3.  Factory calibrated in wide temperature range: -40…85C for sensor temperature and -40…115C for object temperature
4.  High accuracy of 0.5C over wide temperature range (0... 50C for both TA and TO )
5.  High (medical) accuracy calibration
6.  Measurement resolution of 0.02C
7.  SMBus compatible digital interface
8.  Power saving mode
9.  Customizable PWM output for continuous reading
10.  Embedded emissivity compensation
11.  3V supply voltage

Product Name : Fan Metal Finger Guard
Material : Metal
Fit for Fan Size : 80mm x 80mm / 3.15" x 3.15"(L*W);
Total Size : 90mm x 90mm
Colour : Silver Tone
Net Weight : 12g

We use these as speaker covers on the arcades we build.

What's in the box?

1 x grill

Description:

Using the analog I/O - module RevPi AIO your RevPi base module can be expanded by 4 analog inputs, 2 analog outputs and 2 RTD input channels. This expansion module is connected to your base module by the means of the overhead PiBridge plug. Inputs, RTD inputs and outputs are galvanically isolated to each other. Differential inputs eliminate ground loops.

Analog input range/options: +/- 10 V, 0 – 10 V, 0 – 5 V, +/- 5 V, 0 – 20 mA, 0 – 24 mA, 4 – 20 mA, +/- 25 mA

Analog outputs range/options: 0 – 5 V, 0 – 10 V, +/- 5 V, +/- 10 V, 0 – 5,5 V, 0 – 11 V, +/- 5,5 V, +/- 11 V, 4 – 20 mA, 0 – 20 mA, 0 – 24 mA

The 2 RTD inputs enable temperatures to be measured with high precision from -165°C to +600°C in steps of 0.5°C using common RTDs sensors like Pt100/Pt1000 probes. The probes can be connected directly to the module with 2, 3 or 4 cables.

Just like the digital IO modules, RevPi AIO is protected against disturbances according to EN61131-2 and can be operated between -40 and +50°C ambient temperature and up to 80% relative humidity. It is also protected against static discharges, burst and surge impulses in accordance with EN61131-2 requirements.

The required PiPridge Plug (Item No.: 100204) and a set of 14-pole PCB female connectors (Item No.: 200030) are already included in the scope of delivery of this expansion module.

Compliance
EN61131-2
Housing dimensions (H x W x D)
96 x 22.5 x 110.5 mm
Housing type
DIN rail housing (for DIN rail version EN 50022)
Housing material
Polycarbonate
Weight
approx. 115 g
IP Code
IP20
Power supply
12 - 24 V (-15%/+20%)
Current consumption
max. 200 mA at 24V (full load)
max. 400 mA at 12V (full load)
max. 500 mA during start up
Operating temperature
-30…+55 °C
Storage temperature
-40…+85 °C
Humidity (at 40 °C)
93 % (non-condensing)
Voltage measuring range
±10 V | ±5 V | 0…10 V | 0…5 V
Current measuring range
0…20 mA | 0…24 mA | 4…20 mA | ±25 mA
Temperature measuring range
-200…+850 °C
Voltage output range
±10 V | ±11 V | ±5 V | ±5.5 V | 0…10 V | 0…11 V |0…5 V | 0…5.5 V
Current output range
0…20 mA | 0…24 mA | 4…20 mA
Number of input channels
6
for voltage max 4
for current max 4
for RTD (Pt100/Pt1000) 2
Number of output channels
2
for voltage max 2
for current max 2
Galvanic isolation
Input to Input No
Input to Output Yes
Output to Output No
System bus to inputs/outputs Yes
Input type
Voltage/current - differential
RTD 2-, 3-, 4-wire
Output type
single ended, common ground, short-circuit proof
ADC type
24 bit ΔΣ
DAC type
16 bit
Input resolution in process image
Voltage 1 mV (16 bit)
Current 1 μA (16 bit)
Temperature 0.1 K (16 bit)
Output resolution in process image
Voltage 1 mV (16 bit)
Current 1 μA (16 bit)
Max. overall input error (at 25 °C ambient temperature)
Voltage (for all ranges) ±10 mV (±5 mV @ 0…5 V range)
Current (for all ranges) ±20 μA (±24 μA @ 0…24 μA range)
Temperature (for complete range) ±0.5 K
Max. overall input error (for -30…+55 °C ambient temperature)
Voltage (for all ranges) ±10 mV
Current (for all ranges) ±72 μA
Temperature (for complete range) ±1.5 K
Max. overall output error (at 25 °C ambient temperature)
Voltage (for all ranges) ±15 mV
Current (for all ranges) ±20 μA
Max. overall output error (for -30…+55 °C ambient temperature)
Voltage (for all ranges) ±15 mV
Current (for all ranges) ±72 μA
Input conversion time (data rate in process image)
8…1000 ms (adjustable)
Output data rate
1 PiBridge cycle
Output slew rate
Adjustable digital slew rate control - 1 [email protected] kHz up to 128 LSB@258 kHz
Input impedance
Voltage >900 kΩ
Current <250 Ω
Output impedance
Voltage <16 Ω
Max. capacitive load 5 nF @ 1 kΩ
Max. load resistance for current output
600 Ω
Min. load resistance for voltage output
1 kΩ
Further features
All inputs and outputs are linear scalable
Overtemperature monitoring
Overcurrent monitoring
Range monitoring
Optical indicator
3 status LEDs (bi-color)

Technical data also available in pdf format: https://revolution.kunbus.de/wp-content/uploads/manuell/datenblatt/Datasheet_RevPi_AIO.pdf

Tutorials available at https://revolution.kunbus.com/tutorials/

• Name: Arduino MEGA2560 R3 DIY acrylic case
• Dimensions: 118 x 72 x 18mm
• Weight: 72g
• Material: A level acrylic
• For Arduino MEGA2560 R3 Development Board only

• 3D printer T8 400mm Stainless Steel Lead Screw Screw nut Mounted ball bearing Shaft coupling Motor.
• Screw mainly use for Stepping motor driving guide rail,machine tool, and other equipment.
• Screw without processing, direct connected to bearing.
• T shape design, make of high quality stainless steel material.
• Easy to install and convenient to use.
• Fine producing and practical.
• Suitable for Industrial automation equipment, stepper motor rails;
• Fit for 3D printer; engraving machine; XYZ module; slider; lifts ect.

This is a split-core current transformer which is used as an AC current sensor. It is popularly used for current measurement, monitoring and protection for AC motors, lighting equipment, air compressors, home automation etc.

Features

• Opening size: 13 x 13mm
• Rated input current (RMS): 10% - 120% of that is 1A~100A
• Output voltage(RMS): linear output. when the input current is 100A, the output voltage is 1V
• Linearity: ± 3%
• Output connectors: 3.5mm standard three-pin plug
• Lead length: 1m

What's in the box?

1 x Split-Core Current sensor